Transmission-gearing.



Patent-ed Oct. 19, 1915.

2 SHEETSSHEETI.

A. B. &'C. C. SMALL.

TRANSMISSION BEARING.

APPLICATION mzn sE PT.29. 1914.

1,156,938. S I Patented 00t.19, 1915.

2 SHEETS-SHEET 21 I W I 4 S w m4 COLUMBIA 'PLANOGRAPH CO.,WASHINGTON. n.c.

anvawtm' ALFRED B. s ALnANn cARLETon C.,S1VIALL, oraiunxncrrv,FLORIIDA.- I

' TRANSMiss Qit-GEAB NG.

' To all whom it may canoe/WU Y Be it known that we, ALFRED B. SMALL andOARLETON C; SMALL, citizens of the The main object of the presentinventioii is to reduce the number of gears through which the power istransmitted on speeds other than direct drive and atthe same time.

afford a direct drive on the desired ratio, incidentally reducing thefrictionand; obtaining a greater i proportionate delivery of power-pergiven gear ratio, oneof the main features of the invention residingintransmitting the power of the engineer driving shaft directly toeither the main transmission shaft or to the countersh'aft.

' With the aboveand other objects in View, the invention consists'in thenovel construc (tlOII, combination and arrangement of parts, as will behereinaftermore-fully described, illustrated and claimed. 1

In the accompanying drawings :-Figure 1 is a plan view of thetransmission gearing of this invention the top or cover of the gear casebeing omitted and parts being shown in'dotted'lines: Fig. 2is-a sideelevation of the same with the adjacent wall of the gear casereinoved.Fig; 3- is avertical k cross sectiononthe line 33 of Fig.1. Fig;

i 4 is a vertical cross section on the line I L-'4 of Fig; 1. Fig. 5is-a detaillongitudinal'section. illustrating'the slide joint betweenthe sections of the driving shaft.

Referring to the drawings generally 4 designates the driving shaft whichin automobile practice constitutes-what is'knownas the drive shaft ofthe machine, the same usually leading from the foot operated 59 lclutchrearwardly to the transmission gearingand differential.'

Under the present Lmventiom'the shaft A comprises. a forward section 1to which is fastened the usual foot operated clutch 2 r shown in theform of the usual cone clutch 3 although of course any desired'form of iSpecification of IiettersIate-nt.

. clutch may be used atthi's point. The shaft A also comprises'asection?) which is con nectedto the section 1 by a universal j oint'etand which is connected to theneXt section 5 'Patch tedflct. 19, 191 5.Applicationfiledse itemter 29,1914. s rialnoysseuas. v v

TED S AT i T I in rear thereofby another universal oint 6,

the construction referred to enabling the shaft A to be shiftedlaterallyfrom the full line position .to' the dotted line position'shown in Fig. land vice versa for a purpose which w11l heremafterappear.

' At its rear extremity the shaft section is provided with a male clutchmember 7 adapted to 'be moved into and out of engage- V '70 adjacentextremity'of the main transmission H 1 shaft 9 which under oneadjustment ofthe ment with a female clutch member 8 on the partsforms-anextension of the shaft A.

Parallel to the transmission shaft A is a countershaft 10' whichisprovidedat its for- Ward and with a female clutch member 11;

corresponding exactly with the clutch memher 8 andalso adapted to beengaged by the ma'le'clutch' member 7 "on the adjacent 3X1 tremityof'the shaft A when thela'st named shaft is-shift'ed inthe mannerindicated in U the drawings and above referred to..

l The shafts 9' and-l0 extendinparallel re- 7 I lationto each otherthrough a gear case 12 in which they are journaled and "held againstlongitudinalmovement, said gear case being ofxsufiicient size to receivethe shafts 9 and 10 andthe gearing associated therewith. The shaft- 9has thereon gears a, c, e and g while the shaftilO has thereon gears b-'d, f and it. :The gearson one of.

saidh shafts are made permanently fast into locked engagementwiththeshaft one at'a time only by means hereinafter referred. toL'Silentchains 2' connectthe gears a an'djb, the gears c 'and d, andthegearse and f thereon while the gears on the other shaft are normallyloose but'adapted to bejthrown as indicated infFig. .-1 While the gearshand glare of the spur type and mesh directly with-each other sothatwhen the gears 72,-

andg are in operation, the shafts 9 and 1O 10 are driven in the samedirection'by means are driven in opposite directions. Under all 3 0f theother gearsjhowever, the shafts 9 and of the sprocket 'gearsand silentvchains re'-' ferred to. I

' In connectionlwith the universal joint 4 or immediately adjacentthereto, the shaft A is provided with slide joint as shownin Fig. 5, oneof the shaft sections indicated at l-being centrally and longitudinallybored as shown'at 13'to receive the adj acentsection l of the shaftwhich fits therein and is provided with one or more keys 14 received inone or more corresponding key ways 15 in the shaft section. A thrustspring16 is arranged behind the forward extremity of the shaft section 1as shown in Fig. 5, "said spring also bearing against an internalshoulder 1'? within the shaft section 1.

Therefore, the spring 16 serves to thrust the shaft section 1 and othersections in rear thereof rearwardly so as to maintain the en gagementbetween the clutch member 7 and prises a pair of double faced clutches18 and 19 movable in opposite directions to engage the walls at oppositesides thereof by means of forked shifting levers 20 and 21, the clutches18 and 19'being feathered to the shaft 9. Connected to the levers 20 and21 and extending forwardly therefrom are clutch rods 22 and 23 which areadapted to be engaged one at a time by means of a gear shifting lever24: which is moved laterally to engage the desired rod 22 or 23 and thenthrust forwardly or rearwardly to effect an engagement between thedesired gear and its shaft. In this way only one of the gears a, 0, eand 9 may be locked to the shaft at a time. at must be understood,however, that instead of locking the gears a, 0, e and g to thetransmission shaft 9, the same result may be obtained by providing meansfor locking the gears Z), (Z, 7 and it to the countershaft 10 The shaftA may also be shifted by any desired means, that shown consisting of amanually controlled lever 25 universally fulcrumed at 26 on the frameand connected at 27 to the shaft Awhich at this point is shown asjournaled in a slidable bearing 28 movable in a fore and aft directionand mounted in turn upon a laterally slidable bearing 29 thus providingfor both movements of the shaft A, one movement being endwise to throwthe clutch member 7 toward and away from either of the clutch members 8and 11 and the other movement being lateral as indicatedby dotted linesin Fig. 1 so as to .effect an engagement of the shaft A with either theshaft 9 or the countershaft 10.

By shifting the main driving shaft from the main transmission shaft tothe countershaft, the number of gears now necessarily used is decreasedand it is only necessary to transmit the power from one shaft to theother and not'in both directions back and forth as is now the case.Under the present invention inall other gears than direct gear, thepower is transmitted from the driving shaft-direct to the countershaftand then by means of the silent chains to the main transmission shaft.This results in a: reduction of the number of gears through which thepower is transmitted and a proportionate reduction in friction-and ofcourse a proportionate increase in the power delivered to the drivingwheels of the machine. This is true with regard to all speeds other thandirect drive. ln the direct drive, the powerof the driving shaft isdelivered directly to the main transmission shaft which in turn drivesthe differential gearing directly.

It will be understood that the gear case and thetransmission gearing maybe placed at any desired location either forward close to the engine orrearward in close proximity to the difierential gearing, the last namedlocation being preferred inasmuch as the greater the length of thedriving shaft from thecone clutch to its point ofconnection with thetransmission gearing, the less the angle of offset required to be takencare of by the universal joints referred to.

o What weclaim is 1 In transmission gearing, a driving shaft, a maintransmission shaft, a countershaft parallel :to said transmission shaft,a set of gears on the. transmission shaft, a set of complemental gearson the countershaft, clutch members on the corresponding extremities ofsaid transmission shaft and countershaft, a clutch member on theadjacent extremity of said driving shaft, and

means for shifting the last named clutch memberinto engagement witheither of the first mentioned clutch members, and locking and unlockingmeans for the gears on one shaft.

2. In transmission gearing, a longitudinally and laterally movabledriving shaft, a main transmission shaft, a .countershaft parallel tosaid transmission shaft, a set of gears on the transmission shaft, a setof complemental gears on the countershaft, clutch members on thecorrespondingv extremities of said transmission shaft and countersha-ft,a clutch member on the adjacent extremity of said driving shaft, meansfor. shifting the last named clutch member into engagement with eitherof the first mentioned clutch members, and locking and unlocking meansfor the gears on one shaft.

In transmission gearing, a driving shaft, a main transmission shaft, acountershaft parallel to said transmission shaft, a set of gears on thetransmission shaft, a set of complemental gears on the counter shaft,chains connecting complemental gears of said sets causing thetransmission shaft and countershaft to revolve in the same direction,clutch members on the corresponding extremitles of sald transmlsslonshaft and countershaft, a clutch member on a the adjacent extremity ofsaid driving shaft,

, member into engagement with either of the means for shifting the lastnamed clutch first mentioned clutch members, and locking and unlockingmeans for the gears on one shaft. V

' 4. In transmission gearing, a driving shaft, a main transmissionshaft, a countershaft parallel to said transmission shaft, a

set of gears on the transmission shaft, aset of complemental gears onthe'countershaft,

chains connecting complemental gears .of saidsets causing thetransmission shaft and countershaft to revolve in the same direc-' tion,clutch members on the corresponding" extremities of said transmissionshaft and countershaft, a clutch member on the adjacent extremity ofsaid driving shaft, means 7 for shifting the last named clutch memberCopiesof this patent may be obtained.for

iS adapted to be thrown into and out of; I

looked engagement with its shaft toreverse i the direction of rotationof said shafts.

nally and laterally movabledriving shaft,

; 5. In transmission gearing, a longitudi a main transmission. shaft-,acountershaftparallel to said transmission shaft, a'set of gears on thetransmission shaft, a set of;

complemental gears on the co mtershaft,

"clutch members on the corresponding ex.- -tremities of saidtransmission shaft and countershaft, a clutch memberon the adja-v centeXtremity of said driving shaft, means for shifting theflast namedclutch-member into ngagement with either of the first.

mentioned clutchmembers, locking and un- I locking means for the gearson onejshaft, and means for yieldingly holding said drivshaft orcountershaft. 1

turesin presence of two witnesses.

. ALFRED B. SMALL.

*OARLETON o. SMALL.

Witnesses:

GUSSIE MILLER, LoIs HALE.

Washington, D. 0. I

ing shaft toward either the transmission Y In testimony whereof we aflixonr signa J i five cents each, by addressing the Commissioner ofPatents,

